1 CONCENTRATION VALUE CALCULATION METHOD OF GAS DETECTOR USING FIRST-ORDER EQUATION FOR EACH SECTION

The present invention relates to a concentration value calculation method of a gas detector using a linear equation for each section, comprising: a lookup table generating step of a lookup table generation part receiving n+1 (n is a positive integer of equal to or greater than 7 and equal to or less...

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Hauptverfasser: SUNGJIN IM, PARK GYOU TAE, RYU YOUNG DON
Format: Patent
Sprache:eng ; kor
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Zusammenfassung:The present invention relates to a concentration value calculation method of a gas detector using a linear equation for each section, comprising: a lookup table generating step of a lookup table generation part receiving n+1 (n is a positive integer of equal to or greater than 7 and equal to or less than 9) voltage values matching the concentration values of n+1 species from a gas detector having a test gas with the concentrations of the n+1 species injected thereinto, and generating a lookup table including n+1 data pairs consisting of the n+1 concentration values and the n+1 voltage values; a reference data defining step of a reference data definition part defining the n+1 data pairs included in the lookup table as n+1 reference points on the XY plane; a linear equation calculating step of a linear equation calculation part defining n intervals, which are intervals between two adjacent reference points among the n+1 reference points, defining n linear equations indicating n straight lines for connecting the two adjacent reference points among the n+1 reference points, and substituting the coordinates of the n+1 reference points into the n linear equations to calculate the n linear equations for each of n sections; and a concentration value calculating step of a concentration value calculation part referring to the n linear equations to calculate a measured concentration value corresponding to a measured voltage value measured by the gas detector in response to the injection of an unknown gas to be measured. According to the present invention, a section to which the measured voltage value measured by the gas detector in response to the injection of the unknown gas to be measured belongs is determined, and the measured voltage value is substituted into a linear equation corresponding to the section to calculate the measured concentration value, thereby improving the calculating accuracy and calculating speed of the concentration value of the gas detector. 본 발명은 구간별 1차 방정식을 이용한 가스 검지기의 농도값 산출 방법에 관한 것이다. 본 발명은 룩업 테이블 생성부가 n+1(n은 7 이상 9 이하의 양의 정수)종의 농도를 갖는 시험가스가 주입된 가스 검지기로부터 상기 n+1종의 농도값에 매칭되는 n+1개의 전압값을 입력받고, 상기 n+1종의 농도값과 상기 n+1개의 전압값으로 이루어진 n+1개의 데이터 쌍을 포함하는 룩업 테이블을 생성하는 룩업 테이블 생성단계, 기준 데이터 정의부가 상기 룩업 테이블에 포함된 n+1개의 데이터 쌍을 XY 평면에 n+1개의 기준점으로 정의하는 기준 데이터 정의단계, 1차 방정식 연산부가 상기 n+1개의 기준점 중에서 인접하는 2개의 기준점 사이의 구간인 n개의 구간을 정의하고, 상기 n+1개의 기준점 중에서 인접하는 2개의 기준점을 연결하는 n개의 직선을 가리키는 n개의 1차 방정식을 정의하고, 상기 n개의 1차 방정식에 상기 n+1개의 기준점의 좌표를 대입하여 상기 n개의 1차 방정식을 n개의 구간별로 연산하는